Sincerity; the quality of being honest and genuine — showing true feelings or good faith without deceit.
謝罪の言葉だけでなく、誠意を示す行動が必要だ。
Not just words of apology, actions showing sincerity are necessary.
彼女は誠意を持って対応してくれたので、信頼できると感じた。
She responded with sincerity, so I felt I could trust her.
請願書には署名とともに誠意を示す理由が記されていた。
The petition included reasons showing the signers' sincerity along with their signatures.